Method of and apparatus for uniting bases to the glass bulbs of electric incandescent lamps and similar articles



July 16, 1935. I P, HERRE Erm. 2,008,503

METHOD OF AND APPARATUS FOR UNITING BASES TO THE GLASS BULBS OF ELECTRIC INCANDESCENT LAMPS AND SIMILAR ARTICLES Filed Deo. 14, 1935 3 Sheets-Sheet l Inventors: 60 peter' Her-re, Decz'v Margarete Herve, reErpel,

Gerda, Herre, Ursula Heir-PQxecndrices,

Arthur Hix,

Tazza AT Tan Ns.' Y

I5 Sheets-Sheet 2 P. HERRE E'l" AL Filed DeO. 14, 1953 Inventors l y Pvc-213er` Herre, Deaf 3y.

Margarete Herre, ne'eErpel,

Gerda Herre, Ursula Herre, Executrces, Arthur Hix,

E? THEJA ra-'annui' L July 16, 1935.

2 M. Il

ELECTRIC INCANDESCENT LAMPS AND SIMILAR ARTICLES METHOD OF AND APPARATUS FOR UNITING BASES TO THE GLASS `BULBS OF I f y 2 July 16, 1935 P. HERRE Erm. 2,008,503

METHOD OF AND APPARATUS FOR UNITING BASES TO THE GLASS BULBS OF ELECTRIC INCANDESCENT LAMPS AND SIMILAR ARTICLES Filed Deo. 14, 1933 3 Sheets-Sheet 3 MV l 5 67 94 Inventor-s peter' Her-re, Dec/3K..

Gerda Herre,

Arthur* Hx,

75 Ursula Herre, Executrrices,

THEIR AT TDANL'Y Patented July 16, 1935 N UNITED STATES ,2,008,503 PATENT/OFFICE METHOD oF AND APPARATUS Fon UNITING v BASES To THE GLASS BULBscoF ELEC- TRIC IN CANDE SCENT LAR ARTICLES LAMPS AND SIML Application December 14, 1933, Serial yNo.2(l2c430 In Germany December 17,1932- 11 Claims.L

,The invention relates to methods of and apparatus for uniting bases to the glass bulbs Vof electric incandescent lamps'and similar articles.

The usual method of cementing metal bases to the bulbs of electric lamps consists in applying an annular shoulder of cement to the inner edge of the base, then placing the base over the neck of the bulb with the cement in contact with the said bulb neck and heating to harden the cement, as shown in Patent No. 1,306,643 to Swan.

According to the invention, a base, usually comprising a threaded cylindrical metal shell, is placed on the neck of a glass bulb after which the correct amount of cement is inserted in the said base through an opening therein. 'Ihel ce4 ment is then heated to harden it. The cement may be advantageously introduced through the usual hole in the end of the base through which a lead wire extends to the end contact. In this method, the cement flows into the space between the base shell and the bulb neck, thus insuring a uniform distribution of cement therebetween. Inorder to insure a compact and complete filling of this space a jet of compressed air may be introduced into` the base through the said hole. In the old method described above there yisa possibility of the displacement of the cement during the transferring of the base with the cement therein to the bulb neck.

Further features and advantages of the invention will appear from the following description of species thereof and from the drawings.

In thedrawings, Fig. 1 is an elevation of apparatus comprising the invention; Fig. 2 is an elevation thereof in section and to a larger scale; Fig. 3 is a partially diagrammatic elevation of electrical contact mechanism which renders the cement applying mechanism non-operative when a lamp holder comes into position without a base; Fig. 4 is an elevation showing a compressed air nozzle in operative position; and Fig.,5 is an elevation of a milling attachment for cleaning the surface of the end contact of the base.

Referring to Fig. 1, a rotatable indexing table I is provided with a plurality of vertically reciprocating lamp holders Il which consist lof tubes connectedto a vacuum source (not shown) and have seats I2 at the upper ends thereof which support and firmly grip the bulbs I3 of 50 electric incandescent lamps. The said lamp bulbs I3have filaments I4 sealed therein (Fig. 2) and leading-in wires I5, II extending `through said bulbs. A base comprising a screw threaded cylindrical metal shell I1 is placed over the neck of the bulb I3 so that one edge thereof rests on said'bulb.' The v opposite end of sai-d base shell Il is provided'with an insulating mass I8 having aneyelet I9 sealed in the end thereof through which the lead wire I6 extends. The other lead 'wire I5 is bent down between the edge of the shell I1 and bulb I3.- "The lampis maintained in an exact vertical position by an angular support 20 mountedon table IDand extending upward adjacent' to the holding tube I I and having a horizontal portion 2l with a hole 22 therein which engages the upper end of the lamp base.

A cementwcontainer comprising a cylindrical metal tank 23`i`s'disposed above the table II) and axially of `the lamp I3 and holder I I. The said container 23i`s provided with a screw cover 24, anlopening25 in the side for filling it with cement 26, a cover ,2l therefor, and a conically converging bottom` 2B.-` A nozzle'29 is mounted in a spout 30 at lthe bottom, being held therein by a nut 3|. A-tube'32 is arranged in the axis of the container 23 so,` that itcanyreciprocate through the cover 24 and is closed at its lower end by a plug 33 which acts as a piston.` A rod 34 is slidably mounted in the tube 32 and carries a needle 35'at its lower 36A through which the needle Y35 passes toward the hole in nozzle 2,9 when the'rod 34 is moved downward. In order to prevent thetube 32 from carrying some of the cement 26 upward and to minimize agitation of the cement, a sleeve 3'I, which acts also as a guide for the said tube 32,.is,mount ed on the cover 24. A cylindricalftube 38 is mounted on the lower end ofthe sleeve 3'I and extends intotlie cement, thereby forming an air cushion or buffer in thespace 39 which exerts a, downward pressurevon the cement when the tube 32 is raised.

The container 23'is mounted on a pair of arms u4II.of a slide 4I ywhich isslidably mounted in a vertical guidemember 42 which is mounted on a stationary table43 (Fig. l) A vertical rod 44 'is slidablymounted in the arms 4B and carries a cross-arm 45 fat its upper end which is held in Vplacebya nut 46. The cross-arm 45 terminates :5 5. The opposite end of thesaid lever 53 is coninected by .a link 56' tothe cross-arm 45 and thus alsov to the-vertically reciprocating rod 44. The

lower end of said rod V4lI is connected by a link 5l to one end of a lever 58, the opposite end of which is pivotally mounted on a pin 59 in the table 43. The end of lever 58 is pulled down by a spring `core 'i4 is again released and pushed out by `springv 'I5 'toy assume a blocking position under 69 which tends to keep a roller 6I on said lever in contact with a disc cam'62. VThe said cam 62 is mounted on a machine-shaft 63 which completes one rotation for each'indexing of the base.v

cementing machine table I0. The piston 32-33 and rod 44 are moved up and downhonce during` upward, so Vthat the rod 34 and 4needle `35 are moved downward by the fork 52V acting on pin 5I. The said needle 35 enters the nozzle 29 when the piston 32-33 is raised, thereby forcingv the cementf remaining in the said nozzle into the lamp base I1, and thusy cleaning out'said nozzle. Toward the end of the upward movement of the rod 44 and piston 132-33, a collar 64 on said rod 44 comes in contact Vwith the upper arm 40 ofrslide4l Vand liftsrthe slide together with theA cement container 23 and the rod 34. The nozzle 29 is thus lifted clear of the lamp base I1 so the lamp is indexed to the next operating Yposition and anew lamp is brought in position under said nozzle. The rod fill is then moved downward and inthe first part of the movement the slide 4I and container 23 follow along by the action of theirweight until a stop screw 65 on the slide engages the top of the guide Vmember 42. The nozzle 29 V'has then entered the hole in the eyelet I9 ofthe-base 'I'I as showninFig. 2. The pistonr32-33 then moves downward along with the rod 44. The said piston enters the spout and forces cement through, the nozzle 29 into the inside of the base I1, thecement being shown at 65. During the downward motion of the pistonr32'33, the lever 53 is piv'oted counter-clockwise by the link 56v thus withdrawing the needle from the nozzle 29 as'shown in Fig. 2. Y

In order toprevent cement from being" forced out when there` is no base or lamp in the cement Vlling position, a contact mechanism shown in Fig. 3l is'provided ahead of that position@ The said mechanism comprises a vertical spring actuated plunger 65 mounted above the path of travel of the lamps so that itfcan reciprocate `in stationary rail lil.l A Contact pin 68 on the upper endlof the plunger Vlili coacts with a counter-conyt'ac't 99 mountedin a support 'I0 on rail- 61. a `Both contacts are connected in `a circuit 'II lwhich in- "cludes a source of current` 12 and the'rwinding of 'any electromagnet 73. The core 'I4 'ro-f the electro- 'magnet serves as a blocking pin for the lever.v58 (Fig, l.) which is guidedby cam 62. The core pin ligis normally forced outward by a spring 'I5 so that it lies across the path of lever 58 and'bef low it, If the tubular lamp holder I I is provided with a lamp` and base then, during the Yindexing v motion into the'cementing position, the top of vthe base Il raises the plunger 66,50 that the con` tact pin' 68 engages pin 69. This closes the circuitY cement into the base.V While the lamp Ais still in themcemen'ting po.sition,'the rod 44 andpiston 32--33 move upward again when the vlever 58 is raised. Atvthe end Vof the upward motion the the said lever 58. If the next holder II is not provided `with'a lampY and base, the plunger 68 will notbeactuated and the lever 58 will remain up, thus holding the entire ceinenting mechanismrat rest;4

"A compressed air nozzle l5 (Figs) may be provided at'the next operating position above the lamp I3 to direct a jet of air through the eyelet I9 and distribute the cement E5 compactly and uniformly in the space between the base shell I'I and the neck of the bulb I3.

V,The lamps then pass through the usual heat-YV ing position to harden the cement and through the lead wire trimming mechanism where the ends-of the lead wires ,I5-LIB are out off. In a subseguentwoperating position a milling tool 'I5 A(lig;r51); maybe provided above the path of travel of thelamps and axially positioned thereto.A The said milling tool l5 is fastened to the lower end ofa vertical shait'll which reciprocates androtates in a bushing T8 mounted on stationary por-f tion I9 ofv the'rnachine. A long-iaced gear 80 is' mounted on the shaft 'il above the milling tool 'IB and meshes with a driving gear 8l which is mounted-,on a shaft 82 which is mounted in the stationary lmember i9, A collar 83 having an annular slot therein is mounted on the upper end o fjshait il; vRollers, 95 engaging the,4 slot 4fare1mounted-,in the yoke end 86 of a lever 8l wliich,ispivotally mounted on a pin 88 in a supportarm 89. The, lever 8l comprises an angular downwardly bent portion 99 which carries a rollerfS! at its end. rhe said ro1ler,r9I is kept in contact with a vertically Vreciprocating plunger 92 ,having Y anY indentation 93 therein, by a spring 94. y y

."When la lampfarrives in the operating vposition under the milling tool 16, `the plunger 92 drops downward, theilever ar1n90 is swung outward by spring94 and kthe 'forward end of lever arml is pressed downward. V4This causes the tool 16 to 'engage the surface of the eyelet I'I 'on'base I'I,

and the rotating tool frees the said eyelet'of cement which may have'beendeposited and hard- `ene'd thereon. In subsequent operating positions ment Aand of the eyelet removed by the tool 16.

' The said nozzle95V is fastened to the lever 81 by clips 9 6 andV is connected bya hose 91 to a lcomj)- pressed air source.

" A smngingbrusn es (rig.l nmay be previded Y tocleanthe outside ofl the nozzle 29. Said brush 5543V ismo'unted on a horizontal arm 99 which is Vmountedcn a'fsleeve IBD.. Said sleeve I BU is rotatably Vrriounted on rod v44 and has an annular groove.' I'9I at ,the lower end which is engaged by `a' yoke arm E92. ,The sleeve |90 has'a curved slot ,193 ltherein which.. engages with a screw |04 mounted on the rod 44 so that when the said rod 44 is `moved up and down, the screw |93, running .-in the slot, causes the sleeve Ill and brush 98 to lswing horizontally back and forth, the brush "thereby moving across the faceof the` nozzle 29.

What is claimed as new and desired to secure by Letters Patent of the United States is:

1. 'Ihe method of uniting a base to the bulb of an incandescent electric lamp or similar article which consists in placing the said base over the neck portion of said bulb and injecting cement into said base through an opening therein to ll at least a portion `of the space between said base and bulb neck.

2. The method of uniting a base comprising a screw threaded cylindrical metal shell having an eyelet at the end thereof to the bulb of an incandescent electric lamp or similar article which consists in placing the said base over the neck portion of said bulb and injecting cement into said base through the opening in said eyelet to fill at least a portion of the space between said base and bulb neck.

3. The method of uniting a base to the bulb of an incandescent electric lamp or similar article vwhich consists in placing the said base over the neck portion of said bulb and injecting cement into said base through an opening therein to fill at least a portion of the space between said base and bulb neck, then directing a jet of compressed air into said base through said opening to uniformly distribute said cement therein.

4. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a holder for holding a bulb in a neck-up position with a base on said neck portion of said bulb having an opening therein, a container for cement having a nozzle therein, means for causing a relative movement between said lamp holder and said container to cause said nozzle to penetrate into said base through said opening and means in said container for discharging cement through said nozzle into said base.

5. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a container for cement having a nozzle therein, a tubular piston in said container, means for reciprocating said piston, a rod having a needle at the end thereof disposed inside of said piston and arranged axially of the said nozzle, and means for reciprocating said rod and needle independently of said piston to cause them to move downward when said piston moves upward so that said needle passes through said nozzle.

6. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a container or cement having a nozzle therein, a tubular piston in said container, a rod having a. needle at the end thereof disposed inside of said piston and arranged axially of said nozzle, a reciprocating rod disposedV outside of said container parallel to said piston, a cross arm connecting said rod and piston, a slide connected rigidly to said container, Va co1- lar on said rod, means for raising said rod and causing said collar to engage saidslide to lift said container, a lever pivotally mounted on a portion of said slide and engaging the upper portion of the said rod and pin at one end and a link connecting the other end of said lever to said reciprocating rod.

7. A devi-ce for uniting bases to the bulbs of electric incandescent lamps or similar articles comprising a substantially vertically disposed container for cement having a nozzle at the bottom thereof, a substantially vertical guide sleeve mounted in the upper part of said container, a reciprocating piston slidably mounted in said guide sleeve and adapted to force cement through said nozzle, and a tube secured to the lower end of said sleeve and surrounding a portion of said piston below said sleeve but spaced therefrom, said tube extending into said cement to form an air cushion around said piston between the surface of said cement and the lower end of said sleeve.

8. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a container for cement having a nozzle therein, a brush disposed in juxtaposition with said nozzle and means for moving said brush across the face of said nozzle.

9. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a movable table, a` lamp holder in said table for holding a lamp bulb and base with the base uppermost, cement injecting mech.- anism disposed adjacent to the path of travel of said lamp and electrical contact mechanism disposed adjacent to the path of travel of said lamp ahead of said cement'injecting mechanism comprising a resiliently mounted plunger disposedin the path of travel of said lamp base, and mechanism'comprising an electrical circuit actuated by said plungerfor rendering said ce.- ment injecting mechanism inoperative when a lamp holder which is devoid of a base passes by said plunger. f

10. A device for uniting bases to the bulbs of electric incandescentA lamps. and/similar articles comprising a movable table, a lamp holder in said table for holding a lamp` bulb and a base on said bulb having an opening therein, cement injecting mechanism disposed adjacent to the path of travel of said lamp for injecting cement into said base through said opening, and a compressed air nozzle disposed in the `path of travel of said lamp at a position subsequent to the cement injecting position, said nozzle being aligned with the opening in the said base, and

means for injecting a jet of air through saidl nozzle into-said base through the said opening therein.

11. A device for uniting bases to the bulbs of electric incandescent lamps and similar articles comprising a movable table, a lamp holder in said table for holding a lamp bulb and a base on said bulb having an opening therein, cement injecting mechanism disposed adjacent to the path of travel of said lamp for injecting cement into said base through said opening, and a cleaning device disposed adjacent the path of travel of said lamp at a position subsequent to the cement injecting position, and mechanism for causing said cleaning device to engageI the outer portion of said lamp base around said opening and remove extraneous cement which may have been deposited thereon.

MARGARETE HERRE, NE ERPEL, Y GERDA HERRE, URSULA HERRE,

Heirs of the Estate of Peter Herre, Deceased.

ARTHUR HIX.V 

